Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Voltammetric determination of 17 beta-estradiol in different matrices using a screen-printed sensor modified with CuPc, Printex 6L carbon and Nafion film

Full text
Author(s):
Wong, Ademar [1, 2] ; Santos, Anderson Martin [1] ; Fava, Elson Luiz [1] ; Fatibello-Filho, Orlando [1] ; Taboada Sotomayor, Maria Del Pilar [2]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, BR-13560970 Sao Carlos, SP - Brazil
[2] State Univ Sao Paulo UNESP, Dept Analyt Chem, Inst Chem, BR-14801970 Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Microchemical Journal; v. 147, p. 365-373, JUN 2019.
Web of Science Citations: 0
Abstract

A screen printed disposable electrode made of carbon ink modified with CuPc, P6LC and Nafion film is proposed as a low cost and simple analytical method for sensitive determination of 17 beta-estradiol in different matrices. The electrochemical behaviour of 17 beta estradiol was evaluated by cyclic voltammetry in the potential range from 0 to 0.55 V at a scan rate of 0.05 V s(-1) using 0.1 mol L-1 phosphate buffer (pH 5.0) as supporting electrolyte. One oxidation peak was observed during anodic potential scanning, at a potential of 0.39 V. Under optimized experimental conditions, using the differential pulse voltammetry (DPV) technique, the proposed sensor showed a linear concentration range for 17 beta-estradiol between 8.0 x 10(-8) to 7.3 x 10(-6) mol L-1, and detection limit of 5.0 x 10(-9) mol L-1. The CuPc-P6LC-Nafion/SPEF sensor showed good selectivity, sensitivity, stability, reproducibility, and repeatability; it is a low-cost disposable device and shows no interference in DPV experiments. The proposed sensor was successful when applied to environmental and synthetic urine samples, with recoveries close to 100%. (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support Opportunities: Research Projects - Thematic Grants